<template>
  <view class="header">
    <input
      type="text"
      confirm-type="search"
      v-model.trim="inputVal"
      @confirm="confirmHandler"
    />
    <icon class="search-icon" type="search" size="16"> </icon>
    <icon
      class="clear-icon"
      type="clear"
      size="16"
      color="#ccc"
      v-show="inputVal"
      @click="clearInput"
    >
    </icon>
  </view>
</template>

<script>
export default {
  props: ['keyword'],
  data () {
    return {
      inputVal: this.keyword
    }
  },
  methods: {
    confirmHandler () {
      if (this.inputVal) {
        // emit事件给父组件,并传递输入框的值
        this.$emit('search', this.inputVal)
      }
    },
    // 清除输入框内容
    clearInput () {
      this.inputVal = ''
    }
  },
  watch: {
    keyword () {
      this.inputVal = this.keyword
    }
  }
}
</script>
<style lang="less" scoped>
.header {
  height: 120rpx;
  background-color: #eee;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;

  input {
    background-color: #fff;
    height: 60rpx;
    width: 720rpx;
    padding-left: 74rpx;
    box-sizing: border-box;
  }

  .search-icon {
    position: absolute;
    left: 44rpx;
  }

  .clear-icon {
    position: absolute;
    right: 44rpx;
    z-index: 100;
    left: auto;
  }
}
</style>
